73 duster brake question

Zam1787 said
I guess maybe I should specify my exact needs... my car as is.. stops just fine.. manual discs with rear drums.. I do have to apply a lot of pressure with my foot to slow it down, I'm a 230lb rugby player, leg strength is no issue at all. I have a bench seat in the car and when I need to push on the brakes the person next to me feels it to. I was thinking power brake booster would take the load off the amount of pressure needed to
Push the brakes, not necessarily make the car stop faster. If I'm wrong please tell me, I'm not offended by criticism. I have slotted rotors and I'm running 17' rims already so having the room isn't an issue either. As far as vacuum goes, I have a full electronic ignition, and I'm using fuel injection. Everything is controlled electronically so I have very little draw from vacuum as it is. My question is.. will using a vacuum brake booster/master combo take the amount of necessary pressure down, and what parts are needed to do so... thank you guys for your time

The issue with vacuum is more to do with how much you have at idle, and at cruise, not so much with accessories using some of the vacuum. Bigger cams affect the amount of vacuum the engine will make. Stock motors with stock cams typically make between 15" to 19" of vacuum, and brake boosters are designed to work in that range. A bigger cam with more overlap reduces the vacuum, sometimes down betwen 10 - 12", and that may not be enough to make the booster work. Some people get around this by plumbing a vacuum booster between the engine and the power booster - sort of a reserve vacuum canister.
If it were me I'd keep the manual brakes, go with 11.75" in the front and go with discs in the rear. You can always go bigger in the front too, if you're running 17"s - the aftermarket has lots of options, other than the stock 11.75 stuff. But those 11.75's were the upgrade that make it onto B body cop cars of the era.